What is the current water temperature in Holyhead?

Q: What is the current water temperature in Holyhead?

As of now, in Holyhead, the water temperature is 8.02°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Holyhead

Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

46.4

°F

January 15, 12:28

Trend:

decreasing

Yesterday:

46.5°F

Tomorrow:

46.4°F

Sunrise:

08:26

Sunset:

16:30

Day Length:

8 h. 4 min.

Holyhead in January

Minimum:

48.0°F

Average:

49.7°F

Maximum:

51.3°F

Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 46.4°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.7°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 49.4°F on 2016, while the historical minimum was 46.8°F on 2025.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 46.2°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Holyhead

Date	Current Year actual* / forecast**	last year	10 years average
Jan 1	49.2°F	48.0°F	49.7°F
Jan 2	49.1°F	48.7°F	49.5°F
Jan 3	48.7°F	49.1°F	49.5°F
Jan 4	47.9°F	48.7°F	49.3°F
Jan 5	47.9°F	48.6°F	49.2°F
Jan 6	47.4°F	48.5°F	49.0°F
Jan 7	47.0°F	48.5°F	48.8°F
Jan 8	47.2°F	48.4°F	48.8°F
Jan 9	47.4°F	48.3°F	48.7°F
Jan 10	47.0°F	48.0°F	48.6°F
Jan 11	47.1°F	48.0°F	48.5°F
Jan 12	46.4°F	47.7°F	48.4°F
Jan 13	46.7°F	47.7°F	48.3°F
Jan 14	46.5°F	47.5°F	48.2°F
Jan 15	46.4°F	46.8°F	48.2°F
Jan 16	46.4°F	47.7°F	48.1°F
Jan 17	46.3°F	47.6°F	48.0°F
Jan 18	46.2°F	47.5°F	47.9°F
Jan 19	46.1°F	47.4°F	47.8°F
Jan 20	46.1°F	48.0°F	47.9°F
Jan 21	46.2°F	48.0°F	48.0°F
Jan 22	46.0°F	47.2°F	47.8°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Holyhead was recorded on August 29, 2025, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.6°F in Winter, 48.6°F in Spring, 58.2°F in Summer, and 57.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Caernarfon	45.1°F	19mi
Bangor	43.4°F	21mi
Conwy	42.7°F	33mi
Douglas	48.4°F	59mi
Aberystwyth	44.4°F	66mi

* current water temperature in this city

** straight line distance from Holyhead